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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
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package com.sun.media.sound;
/**
* A resampler that uses first-order (linear) interpolation.
*
* @author Karl Helgason
*/
public final class SoftLinearResampler extends SoftAbstractResampler {
public int getPadding() {
return 2;
}
public void interpolate(float[] in, float[] in_offset, float in_end,
float[] startpitch, float pitchstep, float[] out, int[] out_offset,
int out_end) {
float pitch = startpitch[0];
float ix = in_offset[0];
int ox = out_offset[0];
float ix_end = in_end;
int ox_end = out_end;
if (pitchstep == 0f) {
while (ix < ix_end && ox < ox_end) {
int iix = (int) ix;
float fix = ix - iix;
float i = in[iix];
out[ox++] = i + (in[iix + 1] - i) * fix;
ix += pitch;
}
} else {
while (ix < ix_end && ox < ox_end) {
int iix = (int) ix;
float fix = ix - iix;
float i = in[iix];
out[ox++] = i + (in[iix + 1] - i) * fix;
ix += pitch;
pitch += pitchstep;
}
}
in_offset[0] = ix;
out_offset[0] = ox;
startpitch[0] = pitch;
}
}